# dnsattack

**Explanation**

The dnsattack security event in the Netography Fusion Portal is designed to detect DNS flood attacks in your network. DNS flood happens when an attacker floods a DNS server with queries, making it unresponsive to legitimate requests. This can cause network downtime and service disruptions.

**What to Look For**

To examine the results of the dnsattack event, look for excessive DNS traffic in your network. The Netography Fusion Portal will alert you to the source and destination IP addresses involved in the attack. Look for patterns of repeated queries and unusual spikes in DNS traffic volume. Check your DNS server logs for signs of a flood attack, such as an excessive number of queries from a single IP address. Take action to block the attacker's IP address or configure your network to limit the amount of DNS traffic allowed from a single source IP address.

**Related MITRE ATT\&CK Categories**

[Impact: Network Denial of Service, Technique T1498 - Enterprise](https://attack.mitre.org/techniques/T1498)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fusion.vectra.ai/detection-models/library/denial-of-service/dnsattack.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.